/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.accumulo.shell.commands;

import java.io.IOException;

import org.apache.accumulo.core.client.AccumuloException;
import org.apache.accumulo.core.client.AccumuloSecurityException;
import org.apache.accumulo.core.client.TableExistsException;
import org.apache.accumulo.core.client.TableNotFoundException;
import org.apache.accumulo.core.client.security.tokens.AuthenticationToken;
import org.apache.accumulo.core.client.security.tokens.KerberosToken;
import org.apache.accumulo.core.client.security.tokens.PasswordToken;
import org.apache.accumulo.core.clientImpl.ClientContext;
import org.apache.accumulo.shell.Shell;
import org.apache.accumulo.shell.Shell.Command;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Options;

public class CreateUserCommand extends Command {
  @Override
  public int execute(final String fullCommand, final CommandLine cl, final Shell shellState)
      throws AccumuloException, TableNotFoundException, AccumuloSecurityException,
      TableExistsException, IOException {
    final String user = cl.getArgs()[0];

    AuthenticationToken userToken = ((ClientContext) shellState.getAccumuloClient()).token();
    PasswordToken passwordToken;
    if (userToken instanceof KerberosToken) {
      passwordToken = new PasswordToken();
    } else {
      final String password =
          shellState.readMaskedLine("Enter new password for '" + user + "': ", '*');
      if (password == null) {
        shellState.getWriter().println();
        return 0;
      } // user canceled
      String passwordConfirm =
          shellState.readMaskedLine("Please confirm new password for '" + user + "': ", '*');
      if (passwordConfirm == null) {
        shellState.getWriter().println();
        return 0;
      } // user canceled

      if (!password.equals(passwordConfirm)) {
        throw new IllegalArgumentException("Passwords do not match");
      }
      passwordToken = new PasswordToken(password);
    }

    shellState.getAccumuloClient().securityOperations().createLocalUser(user, passwordToken);
    Shell.log.debug("Created user {}", user);
    return 0;
  }

  @Override
  public String usage() {
    return getName() + " <username>";
  }

  @Override
  public String description() {
    return "creates a new user";
  }

  @Override
  public Options getOptions() {
    return new Options();
  }

  @Override
  public int numArgs() {
    return 1;
  }
}
